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Nano-photonic concept has been shown to be very effective for boosting solar cell conversion efficiency. In this work, the novel concepts of non-reciprocality and chiral meta-surface are demonstrated to be very useful for photovoltaics. The asymmetric chiral patterns are designed and optimized using genetic algorithm. The enhanced optical absorption is observed and it is attributed to the non-reciprocal...
The material absorption can be enhanced by increased photonic density of state(PDOS). Here we demonstrate that through the design in the Brillouin zone of nanophotonic light trapping structures, the PDOS can be effectively increased. The theoretical work using rigorously coupled wave calculation shows the increased spectral absorption and the optimal quasiguided mode excitations in terms of their...
The work is to fabricate a CMOS-compatible low-loss Si waveguide structures by KrF Excimer laser reformation system. It also solves the on-chip integration issues between electronics and photonics, as well as reduces the propagation loss for on-chip optical interconnect applications. By applying the mold-assisted method, the propagation loss can be reduced to 2±0.2dB/cm.
Fully integrated photonic devices based on single-crystal silicon and silicon nitride including ring resonators and grating couplers have been successfully transferred to flexible plastic substrate with one hundred percent yield and uncompromised performance.
We demonstrate flexible silicon photonic devices, including ring resonators and Mach-Zehnder interferometers, by transferring from SOI wafer to PDMS. Optical characteristics of these devices could be tuned by deforming the flexible substrate.
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